The Answer is True
Explanation: I did the test and got a 100% tell me if this helped :)
Answer: Its C - For example, it takes years—not days—of practice to become a talented pianist.
Explanation:
Its on edge :) Your welcome
It produces a hydrazone in which the carbon is attached with the nitrogen atom with the means of a double bond.
22. it is because their is only 1 rope on the left side A.
21. is because the water is raised higher as the sticks are doubled in height.
The technique to improve internal validity is D) Addition of a control group.
<h3>What is
internal validity?</h3>
Internal validity serves as the study which bring about the establishment of a trustworthy cause-and-effect relationship that can be found in treatment and an outcome.
it should be noted that Internal validity also helps to eliminate alternative explanations , hence, The technique to improve internal validity is D) Addition of a control group.
Learn more about internal validity on:
brainly.com/question/968894
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COMPLETE QUESTOIN:
Which of the following is a technique to improve internal validity ____________?
A) Experimenter expectancy
B) Participant bias
C) Use of a confederate
D) Addition of a control group
